New Invention Double-speed Motor Amazing Torque

New XD Double-speed Motor is coming...   The main features of the Double-speed motor: a.small volume(max diametre is 132mm); b.big torque,and climbing ability; c.high effeciency(Big torque, low current ); d.when installed the gearshift systerm(freewheel),the speed will be twice as     fast as the original speed.           characteristics One motor with two reduction ratios,torque at climbing is 1.82 times of torque at cruising. Amazing climbing performance. Three types of riding model, high-speed, low-speed and automatic.changing according to the road conditions. Motor, battery and controller is working under a low electric current status,  all parts will works longer.